MAP27: Mount Pain (TNT: Evilution)

MAP27: Mount Pain is the twenty-seventh map of TNT: Evilution. It was designed by Drake O'Brien and uses the music track "Into the Beast's Belly" by L.A. Sieben shared with MAP08: Metal and MAP30: Last Call.

Essentials
Red key

To get the super shotgun and the shell boxes be fast. They lie under a slow crushing ceiling. Knock down the shotgun guys in this room and head west. Turn right and descend down the stairs. The walls here differ having dark brown color. Be careful, there is a slime on the floor. Wear a radiation suit at the far end in the west and return here. Face north (you can see a web) and proceed down the corridor. Go all the way straight. At the fork do not turn left but keep going straight to maze and the end of it.

When you finally reach the end you will see a wall to your left which has an inscription reading "Disaster area". Open it and you will be in a room with yellow lamps at the center. Take a security armor at the southwest of the room, and a wall will lower revealing some enemies, items and ammo. Collect something, and another wall will lower revealing more enemies. Kill them. Enter an alcove to the south. The stairs will be build up. The staircase will lead you to the familiar area, but do not rise for now. Cross at least two steps and return back to that room. A wall to the left is opened and contains revenants and demons. Take a freshly revealed invulnerability sphere at the center to your advantage. Eliminate the enemies and enter the wall they were in. Take the red keycard. Now return to the staircase and rise. When you approach a dead end, press use on the wall to open it, and you will be in the familiar area. Turn left to return to the starting room.

Blue key

Head east in the starting room. Dispatch the imps. You will see two cages having arachnotrons (or Hell knights depending on the skill level). You cannot shoot them nor they can see you. Open the wooden door. It requires the red key, although is not marked by any bars. Another similar door will appear in front. It requires the blue key and you do not have this key yet. Approach this door and return back to the room with the cages. They have to be opened now. Dispatch the enemies that were confined in the cages. Inspect the cages for the blue keycard. Return to the unmarked wooden door and open it.

Accessing the outside area; exit

Open the door. You will be in a room with three doors. Open any one, but it is desired to open the door in front of you. Later, open the door in the east of the corridor. Enter a door in the south or north. Open the last door in the east of the corridor. Take the yellow keycard. Backtrack to the room where you saw three doors. The room became dangerous because of the damaging floor, but a radiation suit has appeared now. Wear it and knock off the cacodemons. Enter the western door. The walls to your left and right are opened now revealing the outside. Go on the safe border towards east where you meet a switch. Flip this switch, and a floor on the left will sink down. Drop down and enter a metal wall, requiring the yellow key (unmarked).

A cave which follows further is rather dangerous. It contains some tough enemies which can hardly be eliminated from your position. For that reason, drop to the crag on the left. Eliminate the revenant or a chaingunner on this crag. Eliminate the revenant which occupies position at the cave opening. Kill the chaingunner which occupies position at the southeastern cave opening (if present). Kill the only mancubus. You can now obliterate the arch-vile (if present) located on the second crag. Now, when it is all clear notice a brightened lift that can bring you to the second crag. Use it in time in order to not wait when it will lower for you. The bottom in the cave hurts. Face east. You will notice a hell sky opening and some lost souls. Drop down there and you will be teleported to the large area. Drop down in order to end.

Secrets

 * 1) From the start of the level go west and turn left to the first alcove leading south. Open the middle part of the western wall (which visually differs from others) to find some health bonuses. (sector 69)
 * 2) In the east part of the long spiral corridor filled with slime, there is a room with the impaled twitching body. Open the south wall of the room to find a radiation suit and a computer map. (sector 218)

Bugs
The door to the small room holding the yellow key has linedef type 117 (PR/Fast/Open-Wait-Close) on the outside and 118 (P1/Fast/Stay Open) on the inside. If the player opens the door from the inside, then opens the open door from the outside, and goes in to the room, when the door closes they will become stuck.

In the wide open area at the end of the map, a large mountain contains numerous teleporting lost souls. Four of them are caught between teleporters that move them in an endless loop around the mountain. Due to how far they are, under vanilla conditions the skulls cannot be hit. In vanilla itself this isn't an issue since lost souls don't count towards the kill percentage, but in ports that do count them (such as GZDoom) it requires either sniping them from afar with mouselook or cheating by clipping through the walls.

There is a visplane overflow in vanilla Doom that can be triggered by standing on either the northern or southern torch-lit sectors and facing the opposite wall in the easternmost chamber of the starting area, once the cages are revealed.

Current Compet-n records
The Compet-n records for the map are:

The data was last verified in its entirety on July 5, 2020.

Current DSDA records
The records for the map at the Doom Speed Demo Archive are:

The data was last verified in its entirety on June 1, 2022.

Player spawns
This level contains four spawn points:
 * 1) facing north. (thing 55)
 * 2) facing north-east. (thing 393)
 * 3) facing south. (thing 394)
 * 4) facing west. (thing 397)

Things
This level contains the following numbers of things per skill level:

Trivia

 * The level presumably gets its name from the mountain-like structure in the far north-east corner of the map, which has several lost souls.